AMBE-2000/2020™ Vocoder Interoperability at 2350 bps
June 2004
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June 2004
Compatible Mode Procedure Step 2.
The next packet should be identical to the packet described in Table 3.
Special Control Packet
Word #
Value
Description
0 0x13ec Header
1
0x0700
Special Control packet
2
0x0834
Special control data
3
0x0005
Special control data
4
0x11bf
Special control data
5
0x0005
Special control data
6
0x0000
Must be 0x0000
7
0x0000
Must be 0x0000
8
0x0000
Must be 0x0000
9
0x0000
Must be 0x0000
10
0x0000
Must be 0x0000
11
0x0000
Must be 0x0000
12-23
Channel Data for AMBE® voice decoder
Table 3.
Compatible Mode Procedure Step 3.
After the packets detailed in Table 2 and Table 3 are sent into the AMBE-2000/2020™
Vocoder Chip the RIS bits in Control Word 2 must be set to 0x3 for each subsequent packet.
If the rate is changed or the device is reset, the above procedure (steps 1, 2 and 3) must be
repeated.
Control Word 2 – (16-bits)
Bit 15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Decoder Output Volume Control
Unused
0
Unused
0
VAD
Unused
0
SL
EC
RIS
Table 4.
